Sahih al-Bukhari Book 61, Hadith 145
I heard the Prophet (ﷺ) saying, "A group of people amongst my followers will remain obedient to Allah's
orders and they will not be harmed by anyone who will not help them or who will oppose them, till
Allah's Order (the Last Day) comes upon them while they are still on the right path."
The Prophet (ﷺ) said, "Some of my followers will remain victorious (and on the right path) till the Last Day comes, and they will still be victorious."
That the Prophet (ﷺ) gave him one Dinar so as to buy a sheep for him. `Urwa bought two sheep for him with the money. Then he sold one of the sheep for one Dinar, and brought one Dinar and a sheep to the Prophet. On that, the Prophet (ﷺ) invoked Allah to bless him in his deals. So `Urwa used to gain (from any deal) even if he bought dust. (In another narration) `Urwa said, "I heard Allah's Messenger (ﷺ) saying, "There is always goodness in horses till the Day of Resurrection." (The subnarrator added, "I saw 70 horses in `Urwa's house.') (Sufyan said, "The Prophet (ﷺ) asked `Urwa to buy a sheep for him as a sacrifice.")